Carpet sweeper brush drive mechanism



Dec. 8, 1936. W PULLEN CARPET SWEEPER BRUSH DRIVE MECHANISM Filed March 31 //v lam/70!? Fred M Pu//er2 Patented Dec. 8, 1936 UNITED STATES PATENT OFFICE CARPET SWEEPER BRUSH DRIVE MECHANISM Fred W. Pullen, Grand Rapids, Mich., assignor to Bissell Carpet Sweeper 00., Grand Rapids, Mich.

Application March 31, 1928, Serial No. 266,268

4 Claims. (01. 15-41) This invention relates to improved carpet is slotted centrally at 12 for the fulcrum pin 8 sweeper brush drive mechanism. and at its inner or brush end is slotted at 13 The objects of the invention are: where it engages the brush pivot 3|. 3| is the First, to provide improved means of automatibrush pivot which engages the end of the brush cally controlling the relative height of the brush in the usual way, and is provided with a bearing 5 and floor wheels under varying conditions. part 33 which is embraced by slots 13, 73 on the Second, to provide improved adjusting fulinner ends of levers l. The outer end of the crumed connections between the floor wheels and shouldered pin 3| is riveted at 34 to a vertical brush. slide 9. This slides vertically in a way 42 formed Third, to provide an improved automatically centrally of the end bar 4 by a bend in the same. 10

adjustable slide support for brush pivot. The riveted end of pin 3| is in a central depres- Objects relating to details of construction and. sion in the bar.

operation will appear from the detailed descrip- A boss 82 is provided on the bar 4 at each tion to follow. The invention is defined in the fulcrum point between the levers l and the said 15 claims. Structures embodying my invention are end bars 4. 15 clearly illustrated in the accompanying drawing, From this descrip it Will be Seen at On in which: the manipulation of the carpet sweeper the brush Fig. 1 is an end view of a carpet sweeper of will be driven because of the yielding connecregular Bissell design incorporating my improved tion betw en the floor Wheels and the brush brush control mechanism. wheel, and as the handle of the carpet sweeper 20 Fig. 2 is a detail sectional plan view of the end is pu a the b u W adjust itself to of the carpet sweeper appearing in Fig. 1, the fulthe floor level whether that be a carpet 01 mg crum means and pivot slide being in section on W th a long pile or a hard surfaced ca p 0 line 22 of Fig. 1. even a hard floor. The brush automatically takes Fig. 3 is a detail sectional elevation taken on the c rr p iti n to p p r y w p h rfa line 3 3 of Figs. 1 and 2, the spring connection v r whi h th rp sw p r is p This and handle support on the end of th carpet is done automatically by the action of the carpet sweeper case being illustrated in full lines. per w n i i nip l d. The action of Fig. 4 is a plan view of the adjusting c0nnec the floor wheels while free is equalized.

tions, wheels and related parts, and guard bars av t s described my invention, at I 30 shown in separated relation, being the parts il- Claim as new and desire to Secure y Letters lustrated in Fig. 2 except that the spring is en- Patent is! tirel mitt d, 1. In a carpet sweeper structure, the combina- The parts of the drawings will be identified by tion of a case, end bars attached to said case 5 numerals of reference which are the same in all c a g a V i Central wey, ch 5 the views. end bar having a fulcrum pin each side of the 1 is the carpet sweeper casing of usual for center, a brush having driving hubs at each end, 2, 2 are the floor wheels. 2|, 2| are connecting slides in said slideways with journal connections axle rods for the floor Wheels at opposite ends to Said brush, floor Wheels at each ide 01'' each 40 of the case. 24, 24 are bearing washers for the end of the said brush contactin ew t to 4 hubs. 3 is the usual brush with its friction puldrive the same, the wheels at each side being ley. 4 is the end bar embracing these parts and supported and connected by axles, spring means secured to the casing by nails 4| (see Fig. 2). 5, 5 acting on Said fi Wheels to maintain y di are the usual ball bearings for the hubs of the contact between said wheels and said brush hubs floor wheels provided with projecting arms 5| and afford yielding spring support for said 45 for the connection of the spring. 6 is the spring sweeper, horizontal levers with slotted fulcrum plate support for the floor wheel spring 6|, conbearings supported on the said fulcrum pins, nected to the arms 5| of the bearings in the usual pivotal connections for the outer ends thereof way. to the hubs of said wheels and slidable slot con- 5 I provide equalizing lever supports 1 between nections to the brush journals.

the floor wheels and the brush. These are car- 2. In a carpet sweeper structure, the comried on fulcrum pins 8 on the end bars 4. In bination of a case, end bars attached to said case the preferred construction pins H on the outer each having a vertical central slideway, each ends of the levers 1 enter the hubs 22 of the floor end bar having a fulcrum pin each side of the wheels and are journaled therein. The lever '1 center, a brush having driving hubs at each end, 55

sides in said slideways with journal connections to said brush, floor wheels at each side of each end of the said brush contacting therewith to drive the same, spring means acting on said floor wheels to maintain yielding contact between said wheels and said brush hubs and afiord yielding spring support for said sweeper, horizontal levers with slotted fulcrum bearings supported on the said fulcrum pins, pivotal connections for the outer ends thereof to the hubs of said wheels, and slidable slot connections to the brush journals.

3. In a carpet sweeper structure, the combination of floor wheels and brush with projecting spindle driven thereby, a case, spring means for maintaining yielding contact between the floor wheels and the brush, lever connections from the brush spindle to said floor wheels, the wheels at each side being supported and connected by axles carried by said levers, and fulcrums therefor supported by said case, the said lever fulcrum connections being slotted to permit the maintaining of contact between the said floor wheels and the brush and whereby the brush and floor wheels are equalized and are free to coact in response to said levers to accommodate different conditions of sweeping.

4. In a carpet sweeper structure, the combination of a case, end bars attached to said case and each provided with fulcrum pins on opposite sides of the center, horizontal levers carrying axles on their outer ends, the inner ends overlapping and having registering slots, said levers having longitudinal fulcrum slots near their centers engaging said fulcrum pins, floor wheels, the wheels at each side being supported and connected by said axles, a brush having hubs between said wheels and operated thereby and having central spindles engaging the slots in the inner ends of said levers, and spring means acting on said floor wheels to maintain yielding contact between said wheels and said brush hubs and afford. yielding spring support for said sweeper.

FRED W. PULLEN. 

